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…showed last 75 words of 218 total…in either oxygen rich or oxygen poor environments due to their ability to synthesize hemoglobin. Ceriodaphnia live in all regions of lakes and ponds whether it is on the surface or near the bottom soil. Ceriodaphnia serves as the main food source for the Hydra in an ecosystem. Notes of Interest: Ceriodaphnia feed on green algae. They also have thoracic appendages that are modified phyllopodia that has bristles for food collecting and respiratory functions. (Prescott, 1978)